Machining device capable of clamping and fixing multiple nuts and using method of machining device

The machining device comprises a table top, a fixing frame is fixedly connected to the center of the bottom of the table top, a controller is fixedly connected to the front face of the fixing frame, and through grooves are formed in the front side and the rear side of the center of the top of the table top correspondingly; an adjusting mechanism used in cooperation with the through groove is arranged in an inner cavity of the fixing frame, the adjusting mechanism is arranged, the clamping seats on the T-shaped frame are synchronously subjected to inward clamping or outward reset adjustment, and the machining requirements of the clamping seats for clamping, fixing and loosening reset of nuts are met; a plurality of nuts are synchronously and automatically clamped and fixed through a T-shaped sliding groove, a T-shaped sliding base, a high-strength elastic plate, a sliding rod, a reset spring, a connector, a locking cylinder, a locking head and a clamping base, time and labor are saved, efficiency is high, mean